As a secondary test

Size: 40 x 40 mm

this pack of 10 magnets will get you far with most projects

But in return for having these available as assorted packages

Stærk pottemagnet med indvendigt gevind (M3)

Power magnet, Ring 8x2x6 mm. hyldeforkant As a secondary testStrong power magnets with a hole for a wire etc. Made of neodymium. Diameter: 0,8 cm. Height: 0,6 cm. Hole size: 0,2 cm. Strength: approx. 2,4 kg. Sold individually with large discount rates from 10 pcs. This magnet is great for projects where you need a strong magnet that doesn't take up so much space. E. g. for the curtain strings if you want to attach them safely to a metal piece on the window frame or door frame so they don't hang loose.